Li Shenron
Legend
I mean that STR already has plenty of combat uses, and doesn't need further double-dipping. Bounded accuracy, remember? Keeping stacking modifiers from growing out of control?
Yes, this is why anyway I expressed some concerns over that bonus growing to +6.
IIRC in our old 3e house rule, the Grapple skill bonus actually replaced the BAB in grapple checks. It was just a way to make pay for it, so that not every fighter type would be good at it.
I just don't want grappling to be again the main trick against spellcasters. First I'd check that, if there is a problem with that, then I would consider a lower starting point for attempting a grapple or something like that. Or it could be fixed by changing the opposed Str/Dex check with a Str/Dex ST instead, so that some defenders also get the bonus. Maybe also add back an Escape Artist skill.
But in general, the current skill list is quite short so I'm in favor of adding more, but of course only if it doesn't break the system.